By selling 15 mangoes, a fruit seller gains the selling price of 3 mangoes. His gain is

One fill pipe A takes 3 minutes more to fill the cistern than two fill pipes A and B opened together to fill it. Second fill pipe B takes minutes more to fill cistern than two fill pipes A and B opened together to fill it. When will the cistern be full if both pipes are opened simultaneously?

Ankit has three varieties of rice costing 18 Rs/kg,25 Rs/kg and 36 Rs/kg, In what possible ratio he should mix these three varieties so that on selling whole mixture at 23.10 Rs/kg he may get a profit of 10%?

In how many different ways can the letters of the word 'NATIONAL' be arranged?

Train Passes by a lamp post at platform in 7 sec. and passes by the platform completely in 28 sec. If the length of the platform is 390 m,then length of train (in meter) is

A man borrowed some money from a private organisation at 5 % simple interest per annum. He landed this money to another person at 10% compound interest per annum, and made a profit of Rs. 26,410 in 4 years. The man borrowed 

In the given figure AB, BC and CA is a tangent of a circle if BC=6.3 cm and MC=2.7 cm then the Value of BL is                                                                

(53×87+159×21+106×25) is equal to